Orthodontic appliance.



f APPLICATION FILED APB, 1914.

. 11. 11103111.1011. ORTHODONTIC APPLIANCE.

I .i BJAY D. ROBINSON, OF LOS ANGELES, CALIFORNIA.

ORTHODONTIC APPLIANGE.

Specication of Letters Patent.

PatentedOct. 20, 1914.

Applicationled April 9, 1914. Serialp. 830,752,

T0 all ywhom 'it may concern Be it 'known that I, RAY citizen ofthe United States, residing at Los Angeles, in the county of. Los Angeles and- State of California, have invented. a newy and useful Orthodontic A pliance, of which the `following -is a speci cation,

This invention relatesto an appliance. to

be used in correcting the positions of mal posed teeth, in which a pressure may be exerted upon the tooth in any vdirection to. change the tooth from. an abnormal position to a normal position, andthe object of the invention is toprovide such. a construction7 which may be expeditiously employed to-A in Fig. 1., Fig. 4 is an enlarged frontfele'vation of the non-revoluble engaging means.

Fig. 5 isa front elevation of the toothband showing the engaging means in longitudinal section on-line :vs -wt, Fig. 6. Fig: 6:.is` a section .on line aaa-, Fig. 4. Fig. 7 is a perspective View of the wire and block. Fig. 8v is a perspective view in detail of the tooth band; and sleeve.`

The essential feature of the invention-comprises a nonfrevolubley means. for connectin the archv band 1 with a tooth band 2,l said non-revoluble means permitting a longitudinal adjustment between the arch band. and` tooth band. This lconnectingmeans inthe present embodiment comprises .af block J3,

which is soldered or otherwise secured on. the arch band 1, and the block 3 is receivedin a sleeve 4 which is soldered or otherwise secured to the tooth band 2. The preciseV form of the block 3 and sleeve 4 is immaterial, but itis essential thatthese two mem.v

bers be so constructed` with'l interenga y' g faces that revoluble movement betweent emy while longitudinal Iadjustment,

is prevented, is possible. In the present instance, the block 3 is shown as having four lflat-,'sidf'es, and the sleeve 4 is shown as tubularin cross section. In order to retain the block 3.the outer flanges ofthe sleeve shown in Fig. 8

are bent down as at 5 `over the oter face of the block 3 as shown in Fig. .6, and the sleeve is thus capable of withstanding) a torsional reacting strain on the arch and 1 from 'the tooth band 2 and tooth. Thus,

D. ROBINSON, a

lwhen atooth stands at a correct angle erect but is. out of normal positionl and must be moved to 'correct position withoutaltering its erect angle, the arch band is moved in the requisitedirection which exerts a correspending` pressureon the tooth band and tooth. he important feature Iotthe construction is thatthe nonyrevoluble connection between the arch band and tooth keeps the-tooth at the same angular position in all directions, with respect to the archv band so that although the lconnection is crown and there is greater resistance by the root, this. resistance does not disturb the angular relation but is so that intime the entire tooth has Abeen moved bodily tocorrect position without its erect angle having. been altered. I

Iithe angular direction of the short axis of the tooth is to be altered` a strain on .the arch band. will beimparted to the tooth as indicated. Thus, in. Fig. 1, the left lateral y incisor 6 will have a torsional strain in a horizontal plane imparted to it which will correct it.' A'torsional strain ina vertical lane may be imparted to the tooth to alter its-longitudinal inclination. As this pres-v sure is aSprin pressure, it is constantly exerted and continues until the movement of the #500thA toward a normal "position has taken upall of the spring tension, at which' time the archband should again be adjusted to exert rassure on the tooth for a further period o time, and this operation is continued until the tooth has acquireda normal 1with the.

position. The rotative pressure against .the f tooth is secured, in the following manner :1

Thearclrband isirst set inposition, being secured tothe anchor teeth, and the intermediate tooth band, is placed inl position over the tooth which yis to be,correc ted,and .this toothband is secured temporarily rigidly to the arch band through the medium of .its sleeve and block 3. The flanges 5.of'

the tooth bandsyareethen bent out to allow tlhe'block 3to.move out laterally and then.

vt efarchbandisremoved andthe block 3 of the intermediate toothy band is unsoldered from the.. archband, and revolved slightly lon the arch band' in the required direction, 'and then againsoldered rigidly in position. 'The arch band is then placedv in the mouth and its ends are. connected with the tooth bands of the anchor teeth asbefore, but to connect the intermediate tooth band withY the tooth which is to be corrected, it is now necessary by reason-of the altered vangle of `this tooth band to spring it, placing-a torsional strain on the arch band, in order to slip it onto the tooth which is to be corrected, and this is done so that when this intermediate .tooths band immediately exerts a rotative pressure on the tooth, and this rotativel pressure 4constantly acts upon the tooth, and, the tooth gradually respondsthereto until the tooth has moved toward the desired angle and the rotative ressure has gradually become lessened unt' its effect is gone. Then the arch band is removed from the mouth, and the block 3 of the interagain slightly turned and then resoldered and the arch band placed back in position again, and the intermediate tooth band again sprung over the tooth t`o be corrected and the process is repeated until the tooth has moved into the desired position.'v This removal and replacement of the arch Iband `v is easily accomplished by bending the flanges 5 of the tooth' bands. The tooth bands themselves are not removed. It is obvious that the arch band may'be also so bent 'asto produce an component of pressure between the' two p anes noted to' correct a corresponding lrregularity. The tooth is apt. to

stand' at an 'angle to its normal position both. f1 vertically and horizontally, and invsuch case .the arch band would be given a bend which `Would tend to exert apressure onthe tooth in `a direction which would correct both of these angular displacements. In this manv ner, the `pressure is exerted independently' on each tooth, and it is thuspossible to apply the exact lpressures and in the exact dif rections whic are needed for each indi- 40 vidual tooth,`v so that several teeth, while be-Jl mg. corrected at the same time', are each individually under definite st rainsl required `to. bring them to their respective normal positions.

be slid longitudina ly 'in the sleeves 4 vv'hen desired, after-which, to present further' lion? gitudinal movement, 'ther sleeve may be in` dentedffvvith, pliers to hold the block from sliding endwise. The endsof the varch band.

v are connected to terminal-sleeve 9 secured to 1 anchor teeth 10. Y

, l .What 4I claim. is: i

1. In an orthodontic 'appliance' lantiarch band, an. open angular sleeve be Ween 'the' `anchored ends of the-arch band, means for securing the sleeve to a toothwhich is to be moved, means supporting the ends cfr-th mediate tooth band is again unsoldered and arch band, and a non revoluble block ad- -justable slldably in said sleeve and rigidl lecu'ed at an intermediate point to the arc all s,

2. In an orthodontic appliance, block engaging means adapted to 'be secured to a tooth, an angular block removably secured in said block engaging means, an arch band, .means supportinglv the ends of the archband, said block being non-rotatably secured to an intermediate portion of the arch, band whereby a rotative pressure of the arch band is transmitted through said block and said block engaging means to the tooth.

3. In an orthodontic appliance, an arch band, means supporting the ends of the arch band, an angular block secured to an 'intermediate portion of the arch band, an angular'sleeve, having an open front, and means securing said sleeve to a tooth, said sleeve having a recess with a iiat surface iand receiving said block.

i fi. In an orthodontic appliance ,l between `the anchored ends of `the arch band, an iangular sleeve having an open front side, imeans securing Said sleeve to a tooth, a yiblock'rigidly fitted in said sleeve, said sleeve jbeing provlded lWith means engaging the. gouter face of the block to detachably retain the blockv in said sleeve, and -means for hold- 'ing said block -in the desired angular position :to cause the block to` exert pressure A'through said sleeve and sleeve securin means to the tooth. A

5. In an orthodontic appliance?,- asleeve, means ecuring the sleeve to a tooth, a block adjustable slidably in 'said sleeve and secured to the larch'band, the walls of said sleeve being bentover the sides df the block. 6. An orthodontic appliance comprising a :band adapted to encircle a tooth, a -sleeve on lsaid band rectan lar in cross section, a, block rectangular 1n cross section interlock- Y ing in said sleeve, said block having a cir- In' settlng the ap liance, theblocks 3j may- 4cular, bore, an arch band comprising `a wire circular in vcross section extending-throu h .the bore of the block, `means holdingv he 105 block against revoluble movement with respect to said wire, and means supporting `t ci ends of said wire.

In testimony whereof,"I have vhereunto set' hand. at Los Angeles, California, this 110 4Sdy day of April, 1914.

Y RAY D. ROBINSON. In presence of- 

